Sunday marks the last day the Duke and Duchess of Cambridge will be in the colonies, so it’s time to take stock of their historic 10-day North American Palooza and the memories they left for us to cherish.

Which aspect of Kate Middleton’s fashion sense left you more in awe, the casual cool she projected in Pied A Terre black wedge sandals and JBrand 811 mid-rise skinny jeans, or the understated elegance with which she filled out a Catherine Walker cream-colored cropped jacket?

It’s amazing that Her Duchessness made it through the entire trip with only 40 changes of outfits.

Did you, like us, bust a gut howling at the fun-loving attitude with which Prince William took part in a street hockey exhibition in Yellowknife, Northwest Territories, firing three spirited shots at a trembling amateur goaltender?

And how about that fabulous Dragon Boat Race on Prince Edward Island, where hundreds cheered as the Duke and Duchess paddled so furiously they nearly broke a sweat?

Which is not to overlook a grand motor trip down the Pacific Coast Highway, a polo match at the Santa Barbara Polo & Racquet Club, a private lunch with Giada De Laurentis and a meet-and-greet with Gov. Jerry Brown, who hopefully hit them up for a healthy loan.

A lot of people still are down on monarchies, even though the beheadings ended long ago, but these 21st-century royals deserve recognition as tireless goodwill ambassadors for the U.K.

They maintained a hectic schedule.

They smiled throughout. They brought a joyful …

OK, I can’t go on. My gag reflex is kicking in.

Truth time: I’ve never understood the fascination with the English royalty, beginning with Her Stuffiness the Queen, who can trace her special status to being born to the right family. She’s George W. Bush with better diction.

Inherited superiority is a difficult concept to choke down. It seems like an overly generous prize just for winning the gene pool.

At least lottery winners have to buy tickets.

When our forefathers left England, it wasn’t just for religious freedom, you know. They were sick and tired of all the bowing and curtsying. Royalty takes this throne stuff seriously.

That’s why my favorite scene from “The Naked Gun: From the Files of Police Squad!” is when stumbling Lt. Frank Drebin lands atop a make-believe queen, her legs spread and gown disheveled, on a banquet table amid a room full of dignitaries.

If King George had engaged in a little horseplay like this, American colonists wouldn’t have hated him so much.

It’s probably not fair to burden William and Kate with all this baggage.

They seem like a charming couple, personable and pleasant. Of course, when you are allowed to go anywhere you wish and spend whatever you want, it’s easier to be personable and pleasant.

Among the theories for the open-armed reception they received at every stop on their trip is the storybook romance between a prince and a commoner, the lingering warmth for William’s late mother, Diana, and the irrepressible need for ordinary folks to live vicariously through the lifestyles of the rich and famous.

Give the Duke and Duchess some credit, though.

Their interactions with well-wishers demonstrated a common touch that often eludes the upper crust.

Maybe these two can change the monarchy’s image.

Up until now, when someone mentioned the royals, I always thought of Prince Charles — falling off his polo pony and landing on his head.

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